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Section 11
Testing functionality by secondary injection
12.
Set the phase angle of the injected current slightly higher than the operate value. Switch on the
current and check the time delay.
13.
Check that all trip and start contacts operate according to the configuration (signal matrices).
14.
Finally check that start and trip information is stored in the event memory.
Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Off. Restore
connections and settings to the original values, if changed for testing purposes.
11.11.7.2
Compensated over- and undervoltage protection COUVGAPC
Prepare the IED for verification of settings as outlined in section
"Preparing for test"
1.
Set OperationOV to On.
2.
Connect the test set for three-phase current injection and three-phase voltage to the
appropriate IED terminals.
3.
Inject symmetrical phase voltages equal to the rated voltage.
4.
Decrease the injected voltage in phase L1 and note the operated value (start value) of the
function.
5.
Increase the voltage slowly and note the reset value.
6.
Connect a trip output contact to a timer.
7.
Reduce the injected voltage stepwise to 90% of the operate level, and check the time delay.
8.
Check that all trip and start contacts operate according to the configuration (signal matrices).
9.
Finally, check that start and trip information is stored in the event menu. Repeat steps 4 – 9 for
phases L2 and L3.
If voltage compensation will be used, do the following steps:
10.
Set EnShuntReactor to On and activate input signal SWIPOS.
11.
Check that the line impedance (R1 and X1) and reactor impedance (Xc) are set to the correct
values.
12.
Inject symmetrical phase voltages equal to the rated voltage.
13.
Increase the injected current (same phase angle as the injected voltage) in phase L1 from zero
and note the operated value (start value) of the function. Check that this value is equal to:
U
14.
Repeat step 13 for phases L2 and L3.
15.
Set OperationOV to On.
16.
Connect the test set for three-phase current injection and three-phase voltage to the
appropriate IED terminals.
17.
Inject symmetrical phase voltages equal to the rated voltage.
18.
Increase the injected voltage in phase L1 and note the operated value (start value) of the
function.
19.
Decrease the voltage slowly and note the reset value.
20.
Connect a trip output contact to a timer.
21.
Increase stepwise the injected voltage to 110% of the operate level, and check the time delay.
22.
Check that all trip and start contacts operate according to the configuration (signal matrices).
23.
Finally check that start and trip information is stored in the event memory. Repeat steps 17 – 22
for phases L2 and L3.
If voltage compensation will be used do the following steps:
24.
Set EnShuntReactorto On and activate input signal SWIPOS.
228
in this chapter.
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Commissioning manual
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